diff --git a/testing/dart_isolate_runner.cc b/testing/dart_isolate_runner.cc
index 84f9bd30085e7..cfe0aa1a9c035 100644
--- a/testing/dart_isolate_runner.cc
+++ b/testing/dart_isolate_runner.cc
@@ -59,7 +59,7 @@ void AutoIsolateShutdown::Shutdown() {
         latch.Signal();
       });
   latch.Wait();
-  return true;
+  return result;
 }
 
 std::unique_ptr<AutoIsolateShutdown> RunDartCodeInIsolateOnUITaskRunner(